JP2012028303A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector which can reduce the area and the profile of a plug connector supporting a wire and a receptacle connector connected with a circuit board, can reliably and stably contact the contacts with each other, and can connect the plug connector and the receptacle connector rigidly.SOLUTION: When a plug connector 20 is attached to a receptacle connector 70, a fitting protrusion 81 protruding from a receptacle insulator 71 is fitted in a fitting recess 38 formed in a plug insulator. The contact part 54 of a plug contact 50 is held by the elastic deformation part 96 of a receptacle contact 90 supporting the receptacle insulator.

Description

  The present invention relates to a connector including a plug connector having a plug contact connected to an electric wire, and a receptacle connector mounted on a circuit board.

  Some components (such as speakers, microphones, and vibration motors) of mobile phones, PDAs (Personal Digital Assistants), and other portable information devices cannot be used for reflow after soldering to the circuit board, so they are mounted directly on the circuit board. Can not. Therefore, it is common to mount a receptacle connector on a circuit board, connect the component to a plug connector via an electric wire, and connect the receptacle connector and the plug connector.

Patent document 1 which is a conventional example of this type of connector includes a plug insulator, a pair of metal plug contacts fixed to the plug insulator in one direction, a pair of electric wires connected to each plug contact, It has. Each plug contact has a contact part (contact plate) extending in an orthogonal direction orthogonal to the one direction, an extension part (connecting part, base part) extending from the contact part to the other plug contact side, and the orthogonal direction of the extension part And a pair of press contact plates that extend toward the receptacle connector side and are connected to the electric wire. On the other hand, the receptacle connector includes a receptacle insulator and a pair of metal receptacle contacts that are fixed to the receptacle insulator side by side in the one direction and are connected to the circuit board. A pair of side walls for supporting the receptacle contacts project toward the plug connector side at both ends of the one direction of the receptacle insulator, and a recess for fitting the plug connector is provided between the pair of side walls. It has become. Further, each receptacle contact is supported at one end in a fixed state on each side wall, and the other end can be elastically deformed.
Therefore, when the plug connector is fitted into the recess of the receptacle connector, the free ends of the pair of receptacle contacts of the receptacle connector come into contact with the contact portions of the pair of plug contacts while elastically deforming, so that the pair of wires and the circuit board are electrically connected. Conductive.

Japanese Patent No. 3745318 Japanese Patent No. 3059965

In recent years, with the miniaturization of equipment, the demand for a low profile and a small area for a connector has been increasing.
As a countermeasure, in the connector of Patent Document 1, a plug connector supporting an electric wire is fitted into a box-shaped receptacle connector, and the free end of the receptacle contact is placed on the contact portion of the plug contact formed on the side of the plug connector. As a structure to be contacted from the bottom, the height is reduced. However, since the contact mode between the contacts is the above mode, if the elastic force is reduced as the receptacle contact is reduced in size, the amount of displacement changes due to the influence of the wobbling of the wire and the looseness due to the fitting clearance. Tends to become unstable.
Further, in the connector disclosed in Patent Document 2, the receptacle contact (mounting contact) includes a pair of sandwiching pieces extending in a bifurcated manner from the coupling base, and the contact portion of the plug contact is sandwiched by the pair of sandwiching pieces. As a result, the contact between the contacts is stabilized. However, the pair of sandwiching pieces are simple cantilever springs that are fixed to the bottom side and extend to the fitting side, and the length is necessary to facilitate elastic deformation.
However, if the holding piece is lengthened, the height of the receptacle connector increases and the contact position with the plug contact also increases, so that the contact portion of the plug contact also needs to be increased. Furthermore, since the plug connector and the receptacle connector have a laminated structure (a structure that does not include a concave portion and a convex portion that fit on the opposing surfaces of the insulators), it is difficult to reduce the height of the entire connector. In addition, the overall area of the connector can be reduced due to the laminated structure, but the wire position moves away (becomes higher) from the mating surface (position) of the plug connector and the receptacle connector. When added, the plug connector is likely to be inclined or disengaged.

  That is, regarding the viewpoint of further reduction in height and area saving, the connector of Patent Document 1 has problems of area saving and contact reliability, and the connector of Patent Document 2 has problems of low profile and fitting holding force. .

  An object of the present invention is to reduce the area and height of a plug connector supporting an electric wire and a receptacle connector connected to a circuit board, and to allow the contacts to reliably and stably contact each other. An object of the present invention is to provide a connector capable of firmly connecting the connector.

  The connector according to the present invention includes a receptacle connector having a pair of metal receptacle contacts mounted on a circuit board supported in a state aligned in one direction, a plug insulator, and a state aligned in the one direction in the plug insulator A pair of metal plug contacts supported by the plug connector, and a pair of electric wires extending in a direction substantially orthogonal to the one direction with one end connected to each plug contact, and detachable from the receptacle connector. In the connector comprising the plug connector, the plug contact extends in one direction and in a direction orthogonal to the opposing direction of the plug connector and the receptacle connector, and extends from the contact portion toward the other plug contact side. A pair of connecting portions and a direction approaching each other from the pair of connecting portions And a pair of connecting portions that extend toward the other plug contact side and connect to the electric wire, and the contact portion is fitted and held on a surface of the plug insulator facing the receptacle insulator. A pair of fitting holding portions, a pair of fitting recesses positioned between the pair of fitting holding portions and receiving the connecting portion, and the connecting portion and the electric wire formed between the pair of fitting recesses A receiving recess, and a wall portion adjacent to the receiving recess and aligned with the connecting portion in the one direction and having a pair of wire support holes for supporting the electric wire and extending toward the receptacle connector, The receptacle contact has a fixed portion and a substantially U-shaped cross section extending from the fixed portion toward the other receptacle contact side and opening on the plug connector side. A plug of the receptacle insulator having a portion and an elastically deforming portion in which the interval in the one direction of the opposed inner surface of the substantially U-shaped portion in a free state is narrower than the dimension in the one direction of the contact portion A pair of fixing grooves for fitting and holding the fixing portion on a surface facing the connector, a pair of contact recesses positioned between the pair of fixing grooves and receiving the elastic deformation portion so as to be elastically deformable, Projects toward the plug connector between a pair of contact recesses, faces the free end of the elastically deformable piece in one direction, and fits into the fitting recess when the plug connector is attached to the receptacle connector. It is characterized by having a pair of fitting protrusions to be joined and a wire receiving space capable of receiving the pair of electric wires formed between the pair of fitting protrusions.

  On the surface of the receptacle insulator that faces the plug connector, an accommodation recess that is arranged in a direction parallel to the contact recess and the electric wire and that allows the contact portion to be engaged and disengaged may be formed.

  An engagement protrusion is formed at an end of the wall portion of the plug insulator on the receptacle connector side, and an engagement recess is formed in the receptacle insulator to receive the engagement protrusion when the plug connector is attached to the receptacle connector. May be.

  The wire has a circular cross-sectional shape, and is connected to the fitting protrusion in the wire receiving space on the surface of the receptacle insulator that faces the plug connector, and from the facing surface toward the plug connector. Reinforcing ribs that gradually reduce the amount of protrusion in the one direction from the fitting protrusion may be provided.

  The contact portion of the plug contact may have a two-plate structure configured by bending one metal plate.

  You may form the jig insertion part which can insert and remove a part of jig | tool in the said plug insulator.

A locking recess may be formed in one of the contact portion and the elastic deformation portion, and a locking protrusion that fits into the locking recess when the plug connector is attached to the receptacle connector may be formed in the other.
Further, a first locking projection is formed on one of the contact portion and the elastic deformation portion, and when the plug connector is mounted on the receptacle connector, the first locking projection is overcome and the first locking projection is formed. You may form the 2nd latching protrusion which latches to a latching protrusion.

  On the outer surface of the plug insulator, a pressing protrusion that protrudes in the extending direction of the electric wire and faces the electric wire from the side of the plug connector in the separation direction with respect to the receptacle connector may be formed.

Since the elastically deforming portion of the receptacle contact of the present invention extends in a direction orthogonal to the height direction of the connector, a sufficient elastic force and deformation amount can be ensured even if the height of the connector is reduced. Furthermore, since it is opened in a substantially U shape on the mating side, the plug contact can be easily pulled in and buckling and deformation due to excessive contact of the plug connector can be prevented. Further, since the receptacle contact can hold the contact portion of the plug contact, the contact reliability is good.
Further, since a step is formed between the connecting portion and the connecting portion of the plug contact, and the wall portion of the plug insulator is formed at the step portion, the plate thickness of the wall portion can be increased. Therefore, even when the plug connector is reduced in height and area, it is possible to increase the mechanical strength of the plug insulator and the effect of supporting the electric wire. Further, when the plug connector and the receptacle connector are mounted, the fitting protrusion of the receptacle insulator is fitted into the fitting recess of the plug insulator, so that even if an unexpected external force is applied to the electric wire or the like, the fitting protrusion and the receptacle are fitted. The mating recess can reliably prevent separation of the plug connector and the receptacle connector in the plane direction perpendicular to the contact / separation direction. In addition, although the fitting protrusion protrudes from the receptacle insulator side, the fitting protrusion is fitted into the fitting recess on the plug insulator side, so that the entire connector does not become tall. Furthermore, since the fitting recess and the fitting protrusion can be enlarged in the extending direction of the electric wire while saving the area by the step of the plug contact, the mechanical strength of the fitting protrusion can be improved. Thus, the mechanical strength of the plug insulator is increased, and the fitting protrusion is fitted into the fitting recess, so that the plug connector and the receptacle connector can be connected even when the connector is low-profile and space-saving. Can be connected firmly.
Further, since the fitting recess is enlarged in the direction of extension of the electric wire while saving the area by the step of the plug contact, the width of the receptacle contact fitted in the fitting recess can be increased. Therefore, even when the area of the connector is reduced, it is possible to prevent a decrease in the elastic force of the receptacle contact.

According to the second aspect of the present invention, since the receptacle insulator includes the accommodating recess for receiving the contact portion of the plug contact, the accommodating recess when the contact portion of the plug contact is fitted into the elastic deformation portion of the receptacle contact. Functions as a guide (invitation) for the plug contact, so that it is possible to prevent buckling / deformation of the receptacle contact due to the fitting operation of the contact portion with an unreasonable posture.
Furthermore, after the contact between the plug contact and the receptacle contact, even if an unnecessary force is applied to the plug connector, the position of the contact portion of the plug contact is regulated by the storage recess, so that the contact performance is maintained.

According to the third aspect of the present invention, since the height of the wall portion is increased by forming the engagement protrusion on the plug connector, a large-diameter wire support hole can be formed even in a low-profile plug connector. . Therefore, an electric wire with a large diameter can be used and the electric wire can be supported stably.
In addition, when the plug connector is attached to the receptacle connector, the engagement protrusion of the plug insulator engages with the engagement recess of the receptacle insulator, so that the overall height of the connector can be reduced even when the wire diameter is large. Become.

According to the invention described in claim 4, since the strength of the fitting protrusion is increased by the reinforcing rib, the plug connector and the receptacle connector can be more firmly connected even when the height of the connector is reduced. Even if an inadvertent mounting operation is performed, the fitting protrusion can be prevented from being damaged.
In addition, since the amount of protrusion from the fitting protrusion gradually decreases as the reinforcing rib moves from the surface facing the plug connector in the receptacle insulator toward the plug connector, the reinforcing rib interferes with the electric wire having a circular cross-sectional shape. do not do. Therefore, even when the connector is downsized (the wire receiving space is downsized) and the diameter of the wire is increased, the wire can be stored in the wire receiving space without interfering with the reinforcing rib.

  According to the fifth aspect of the present invention, since the contact portion of the plug is composed of two pieces, the rigidity of the contact portion is ensured even if the plate thickness of the plug contact is reduced due to the low profile and area saving of the connector. In addition, it is possible to prevent deformation at the time of mounting with the receptacle contact. Furthermore, since the thickness of the contact portion is increased, the amount of displacement of the elastically deformable portion of the receptacle contact can be ensured, so that contact reliability is increased.

  When the height of the plug connector is lowered, it becomes difficult for the operator to grip the plug connector.For this reason, the operator pulls the plug connector out of the receptacle connector by pulling up the electric wire. There is a risk of cutting. However, even in such a case, if a jig insertion part capable of inserting and removing a part of the jig is formed in the plug insulator as in the invention described in claim 6, the plug connector can be obtained by using the jig. Can be easily separated from the receptacle connector without damage.

According to the seventh aspect of the present invention, the locking protrusion formed on one of the contact portion and the elastically deforming portion fits (locks) with the locking recess formed on the other, and therefore, between the receptacle contact and the plug contact. The fitting and holding force can be increased, and a click feeling can be obtained when the receptacle contact and the plug contact are connected.
Further, when the receptacle contact is connected to the plug contact, the locking protrusion is fitted into the locking recess after slidingly contacting the vicinity of the locking recess on the surface of the contact portion. For this reason, foreign matters such as dust and dirt adhering to the vicinity of the surface of the contact portion are removed by the locking projection, so that the receptacle contact and the plug contact can be reliably conducted.
According to the eighth aspect of the invention, the same effect as that of the seventh aspect of the invention can be obtained.

According to the ninth aspect of the present invention, when the electric wire is bent, the load on the connecting portion between the electric wire and the plug contact is reduced by bending while making contact with the suppressing protrusion, so that the plastic deformation of the connecting portion is performed. Therefore, even in a low-profile connector, even if the electric wire is bent repeatedly, more stable contact reliability can be obtained.
In addition, when the bending force generated on the electric wire reaches a certain level (before it becomes so large), the plug connector is separated while rotating with respect to the receptacle connector, so that the plug connector or the receptacle connector may be damaged. It is possible to effectively prevent the connection portion from being damaged.

It is the perspective view seen from the front diagonal upper direction of the connection state of the plug connector and receptacle connector of one Embodiment of this invention. It is the perspective view seen from the front diagonally upper direction of the isolation | separation state of a plug connector and a receptacle connector. It is a front view of the connection state of a plug connector and a receptacle connector. It is a top view of the connection state of a plug connector and a receptacle connector. It is sectional drawing which follows the VV arrow line of FIG. FIG. 6 is a cross-sectional view similar to FIG. 5 in a state where the plug connector and the receptacle connector are separated. It is the disassembled perspective view seen from the back diagonally upward of the plug connector. It is the disassembled perspective view seen from the front slanting lower part of the plug connector. It is a bottom view of a plug insulator. It is a bottom view of a plug connector. It is sectional drawing which follows the XI-XI arrow line of FIG. It is the disassembled perspective view seen from the front diagonally upper direction of the receptacle insulator. It is a top view of a receptacle connector when an elastic deformation part exists in a free state. It is sectional drawing which follows the XIV-XIV arrow line of FIG. It is sectional drawing which follows the XV-XV arrow line of FIG. It is a perspective view of a jig. It is a perspective view when a jig | tool is mounted to a connector from back. It is an expanded sectional view showing a part of receptacle contact of a modification. It is the perspective view seen from the front diagonal upper part of the plug connector of another modification. It is the perspective view seen from the back slanting lower part of the plug connector. It is a side view of the connection state of a plug connector and a receptacle connector. It is a side view similar to FIG. 21 when an electric wire is bent upwards.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, front and rear, up and down, and left and right directions are based on directions of arrows in the drawing.
The connector 10 of this embodiment is composed of a plug connector 20 and a receptacle connector 70 that can be connected to and separated from each other. For example, the connector 10 is built in a mobile phone (mobile terminal), a PDA (Personal Digital Assistant), or other information mobile terminals. This is a low-profile connector having a height of about 1 mm that electrically connects the component parts (for example, a speaker, a microphone, a vibration motor) and the circuit board 110.

First, the plug connector 20 will be described mainly with reference to FIGS.
The plug connector 20 includes a plug insulator 21, a pair of cables 40, and a pair of plug contacts 50.
The plug insulator 21 is a substantially rectangular parallelepiped-shaped member that is left-right symmetric and front-back symmetric formed by injection molding an insulating synthetic resin material (for example, polycarbonate, nylon, polyphenylene sulfide, LCP, or the like). As shown in the drawing, wall portions 23 extending in the left-right direction project downward from both front and rear edge portions of the lower surface of the ceiling portion 22 constituting the upper end portion of the plug insulator 21, and the center of the lower end portion of the wall portion 23. An engaging protrusion 24 projects downward from the part. A pair of left and right electric wire support holes 25 are formed as through holes in the front and rear wall portions 23, and a pair of left and right jig recesses (jiring) are formed on the front surface of the front wall portion 23 and the rear surface of the rear wall portion 23. The tool insertion part) 26 is recessed. Slits 27 are formed at both left and right ends of the wall portion 23, and elastic pieces 28 that are elastically deformable in the left-right direction and have locking claws 29 at the lower end are formed on the sides of the slits 27. A total of four first holding holes 31 are formed in the vicinity of the four corners of the ceiling portion 22 as through holes extending in the vertical direction, and a set of four first holding holes 31 is formed inside each first holding hole 31. The left and right two sets of second holding holes 32 (8 in total) are formed as through holes extending in the vertical direction. Further, on the outside of the left and right first holding holes 31, a pair of left and right rectangular third holding holes 33 are formed as through holes extending in the vertical direction.
A partition wall 34 extending in the front-rear direction connecting the front and rear wall portions 23 projects from the center of the lower surface of the ceiling portion 22 in the left-right direction. The left and right sides of the partition wall 34 on the lower surface of the second holding hole 32 are arc surfaces 35 that are concentric and have the same curvature as the electric wire support holes 25 located at the front and rear, and are portions that are continuous with the arc surface 35 on the lower surface of the ceiling portion 22. Is a C-shaped surface 36 having a substantially C-shape when viewed from the bottom. Furthermore, the part located on the outer side of the left and right C-shaped surfaces 36 on the lower surface of the ceiling portion 22 is a recessed portion 38 that is a step deeper than the C-shaped surface 36 (located above). The portion located at is a fitting holding portion 39 which is a recess shallower than the fitting recess 38 (located below).

  The pair of left and right cables 40 are obtained by coating the surface of a core wire 41 (a stranded wire or a single wire) made of a conductive and flexible material with a tubular and flexible insulator 42. The insulator 42 is a cylindrical member having substantially the same curvature as the wire support hole 25 and the arcuate surface 35 of the plug insulator 21. Although not shown, one end (rear end) of the core wire 41 is connected to components (for example, a speaker, a microphone, a vibration motor, and a battery) built in the information portable terminal.

A pair of plug contacts 50 that are symmetrical to each other are formed by processing a thin plate of a copper alloy (for example, phosphor bronze, beryllium copper, titanium copper) or a Corson copper alloy into a shape shown in the drawing by a progressive die (stamping). After the surface is formed by nickel plating on the surface, gold plating is applied.
As shown in the figure, the plug contact 50 includes a first contact plate 51 having a plate shape (plate thickness of 0.12 mm) extending in the front-rear direction and orthogonal to a plane parallel to the plug insulator 21 (horizontal plane in the drawing), and a first A bent portion 52 that extends upward from the center of the upper surface of the contact plate 51 and then moves downward, and a second contact plate 53 that is a plate-like portion that is continuous with the lower end of the bent portion 52 and is parallel to the first contact plate 51. And have. The opposing surfaces of the first contact plate 51 and the second contact plate 53 are separated from each other by a minute distance (may be brought into contact with each other), and the first contact plate 51, the bent portion 52, and the second contact plate 53 are contact portions. 54 is constituted. Furthermore, a locking recess 55 whose side surface has a horizontally long rectangular shape is formed on the outer surfaces of the left and right first contact plates 51 (the vertical dimension and the longitudinal dimension of the locking recess 55 are the contact protrusions 102 described later. Each greater). The front and rear end portions of the second contact plate 53 are provided with connecting portions 56 that extend toward the other plug contact 50 while being curved in plan view, and whose upper surface is located above the first contact plate 51. A locking projection 57 projects from the upper surface of the connecting portion 56. From the lower half of the front and rear connecting portions 56, a connecting portion 59 that extends toward the other plug contact 50 after being bent in the direction of approaching each other extends. The upper portion of each connection portion 59 is constituted by a pair of left and right press contact pieces 60, and holding claws 61 project from the end face of each connection portion 59.

The left and right cables 40 and the plug contacts 50 are integrated with the plug insulator 21 by being fixed to the bottom of the plug insulator 21.
In order to fix the cable 40 and the plug contact 50 to the plug insulator 21, first, the front end portions of the left and right cables 40 are fitted into the arcuate surface 35 from the wire support hole 25 of the wall portion 23 on the rear side of the plug insulator 21. The left and right cables 40 are temporarily held on the bottom of the plug insulator 21 by being inserted into the wire support holes 25 of the front wall portion 23. Next, the first contact plate 51 of the plug contact 50 is fitted to the corresponding fitting holding portion 39 of the plug insulator 21 by moving the left and right plug contacts 50 from below to the lower surface side (upward) of the plug insulator 21. Then, the front and rear connecting portions 56 are fitted into the fitting recesses 38 so that at least a part thereof is aligned with the adjacent wall portion 23 in the left-right direction, and the front and rear connection portions 59 are connected to the front and rear sides of the C-shaped surface 36 and the arc surface 35. The receiving recess 37 is a space created between the wall portion 23 and the wall portion 23. Then, the left and right plug contacts 50 are moved further upward so that the bent portions 52 are fitted into the corresponding third holding holes 33, the respective locking projections 57 are fitted into the corresponding first holding holes 31, When the upper end portion of the pressure contact piece 60 is fitted into the corresponding second holding hole 32, each holding claw 61 bites into the partition wall 34 (see FIGS. 5 and 6), so that the left and right plug contacts 50 are connected to the plug insulator 21. Fixed. Further, when the left and right plug contacts 50 are fixed to the bottom of the plug insulator 21 in this way, the left and right pressure contact pieces 60 of the respective connecting portions 59 break the corresponding portions of the corresponding insulators 42 and are located in the insulators 42. The vicinity of one end (front end) of 41 is sandwiched from the left and right (see FIGS. 5 and 6). Accordingly, the left and right plug contacts 50 and the core wire 41 are in reliable contact, and the cable 40 is completely fixed to the plug insulator 21 via the plug contacts 50.

Next, the receptacle connector 70 will be described mainly with reference to FIGS.
The receptacle connector 70 includes a receptacle insulator 71 and a pair of receptacle contacts 90.
The receptacle insulator 71 is a member having an approximately rectangular shape in plan view that is symmetric in the back-and-forth direction and is symmetric, which is formed by injection molding an insulating and heat-resistant synthetic resin material (for example, nylon, liquid crystal polymer, polyphenylene sulfide).
An engaging recess 73 is formed at the center of both front and rear edges of the bottom plate portion 72 of the receptacle insulator 71. In the vicinity of the left and right ends of the receptacle insulator 71, side walls 74 project upward, and a pair of front and rear locking projections 75 project from the opposing surfaces of the left and right side walls 74. Further, an escape recess 76 having a width narrower than that of the side wall 74 (bottom plate portion 72) is provided in the central portion of the upper surface of the side wall 74 downward. Further, a pair of front and rear contact holding projections 77 are provided at both left and right ends of the receptacle insulator 71, and the upper surface of the front and rear contact holding projections 77 and the opposite surface of the front and rear contact holding projections 77 are provided on the left and right ends. An upper groove 78 and an opposing groove 79 are formed respectively (the upper groove 78 and the opposing groove 79 at both left and right end portions are constituent elements of the fixed groove). On the upper surface of the bottom plate portion 72, a pair of left and right fitting projections 81 facing the left and right side walls 74 with a gap and having a substantially U-shaped cross section project upward. A space between the side wall 74 and the fitting protrusion 81 excluding the front and rear ends is a receptacle contact recess 82 for accommodating the elastic deformation portion 96 of the receptacle contact 90, and faces each other. The space between the side wall 74 and the front and rear end portions of the fitting protrusion 81 is the same as the thickness of the contact portion 54 of the plug contact 50 (however, the upper end portion is tapered so that the contact portion 54 This is a plug contact recess (accommodating recess) 83 that is wider than the thickness. Further, reinforcing ribs 84 connected to the opposing surfaces of the left and right fitting protrusions 81 are provided on the upper surface of the bottom plate portion 72. As shown in the drawing, the reinforcing rib 84 has a cross-sectional shape that gradually reduces the amount of protrusion in the left-right direction from the corresponding fitting protrusion 81 as it goes upward from the bottom plate portion 72 side. Further, an electric wire receiving space 85 is formed between the left and right reinforcing ribs 84.

A pair of receptacle contacts 90 that are symmetrical to each other are formed by a progressive die (stamping) of a copper alloy (eg, phosphor bronze, beryllium copper, titanium copper) or a Corson copper alloy having spring elasticity into a shape shown in the drawing. It is processed, and after a base is formed on the surface by nickel plating, gold plating is applied.
The receptacle contact 90 includes a fixing portion 92 extending upward from a tail portion 91 having a substantially horizontal plate shape, and an elastic deformation portion 96 extending from the upper portion of the fixing portion 92 toward the other receptacle contact 90 side. ing. The fixed portion 92 has a pair of support pieces 93 on both front and rear side portions thereof, and further has holding claws 94 immediately below the support piece 93 on the front and rear side portions. The elastic deformation portion 96 includes a connecting base portion 97 extending substantially horizontally from the upper portion of the fixing portion 92, a hanging piece 98 extending downward while returning from the end portion of the connecting base portion 97 to the fixing portion 92 side, and a lower end portion of the hanging piece 98. A horizontal piece 99 extending substantially horizontally, a rising piece 100 extending upward while returning from the end of the horizontal piece 99 to the fixed portion 92 side, and a free end 101 extending obliquely upward from the tip of the rising piece 100; There are two contact projections 102 and 103 at the connection portion of the connecting base portion 97 and the drooping piece 98, and at the connection portion of the rising piece 100 and the free end portion 101, respectively. Thus, the cross-sectional shape of the elastic deformation portion 96 is substantially U-shaped, and the distance between the contact protrusion 102 and the contact protrusion 103 in the left-right direction when the elastic deformation portion 96 is in the free state is the thickness of the contact portion 54 ( It is slightly narrower than the left and right dimensions. Further, as shown in the figure, a slit 104 is formed at the center in the width direction of the elastic deformation portion 96 of each receptacle contact 90.

The pair of receptacle contacts 90 are attached to the side wall 74 of the receptacle insulator 71 so as to be opposed to each other and aligned in the left-right direction. Specifically, each receptacle contact 90 is positioned immediately above the corresponding end of the receptacle insulator 71 and then moved downward, so that the elastic deformation portion 96 is positioned inside the corresponding relief recess 76 and the receptacle contact recess 82. At the same time, the tail portion 91 and the fixing portion 92 are inserted between the front and rear facing grooves 79. Then, when the lower surfaces of the front and rear support pieces 93 come into contact with the bottom surfaces of the corresponding upper grooves 78, the front and rear holding claws 94 bite into the surfaces of the corresponding opposing grooves 79 (see FIG. 15), so that the fixing portion 92 of the receptacle contact 90 is fixed. Are fixed to the left and right ends of the receptacle insulator 71. Then, as shown in FIG. 14, the elastically deforming portion 96 of each receptacle contact 90 is housed in the receptacle contact recess 82 in a free state away from the receptacle insulator 71 (the bottom plate portion 72, the side wall 74, and the fitting projection 81). Is done.
In this way, after the receptacle insulator 71 and the receptacle contact 90 are integrated, the receptacle connector 70 is configured, and then the upper surface between the reinforcing ribs 84 of the bottom plate portion 72 is sucked by a suction nozzle or the like (not shown) to be mounted on the circuit board 110. The tail portions 91 protruding from the lower surface of the receptacle insulator 71 are soldered to signal patterns (not shown) of the circuit board 110 (see FIGS. 5 and 6).

To connect the plug connector 20 and the receptacle connector 70, first, the plug connector 20 and the receptacle connector 70 are brought into the posture shown in FIG. 2, and the plug insulator 21 is moved downward to the position shown in FIG. 6 while maintaining this posture. . Then, the contact portion 54 of the plug contact 50 moves further downward while being guided by coming into contact with the upper end portion (tapered portion) of the corresponding plug contact recess 83, so that the lower end portions of the left and right contact portions 54 are shown in FIG. The left and right receptacle contacts 90 (elastically deforming portions 96) are contacted in the manner shown in FIG. If the plug connector 20 is further moved downward as it is, since the upper end opening of the elastic deformation portion 96 is tapered, the contact portion 54 does not forcefully deform the corresponding elastic deformation portion 96 without elastically deforming the elastic deformation portion 96. The plug connector 20 and the receptacle connector 70 are completely connected as shown in FIGS. 1, 3, and 5 (the receptacle contact 90 is not buckled or plastically deformed). Then, as shown in FIG. 5, the hanging piece 98 is elastically deformed toward the side wall 74 and the rising piece 100 is elastically deformed toward the fitting protrusion 81 (not in contact with the fitting protrusion 81). Furthermore, both side surfaces of the contact portion 54 are elastically held by the contact protrusion 102 and the contact protrusion 103. More specifically, the contact protrusion (locking protrusion) 102 fits into the locking recess 55 of the first contact plate 51 (contacts the bottom surface of the locking recess 55), and the contact protrusion 103 is the second. It contacts the inner surface of the contact plate 53 (see FIG. 5). Accordingly, the corresponding plug contact 50 and the receptacle contact 90 are electrically connected to each other. Therefore, the cable 40 (the above components such as the speaker, the microphone, the vibration motor, and the battery) and the circuit board are connected via the plug contact 50 and the receptacle contact 90. 110 is electrically conductive. Further, the front and rear end portions of the left and right contact portions 54 are fitted in a state of being sandwiched between portions below the upper end taper portion of the corresponding plug contact recess 83, and the position of the contact portion 54 is regulated by the plug contact recess 83. Therefore, the contact performance between the plug contact 50 and the receptacle contact 90 is maintained even when an external force is applied to the plug connector 20.
Further, the partition wall 34 and the left and right cables 40 of the plug connector 20 are positioned in the wire receiving space 85, the front and rear engagement protrusions 24 are fitted in the front and rear engagement recesses 73, and the left and right engagement protrusions 81. Is fitted into the corresponding fitting recess 38. Further, each of the locking claws 29 engages with a corresponding locking protrusion 75 of the receptacle insulator 71 while elastically deforming the four elastic pieces 28 of the plug insulator 21. Therefore, the connection state shown in FIGS. Retained.

In order to release the conductive state between the cable 40 and the circuit board 110, an upward movement force is applied to the plug connector 20, thereby releasing the engagement relationship between the locking protrusions 75 corresponding to the locking claws 29. After that, the plug connector 20 may be separated from the receptacle connector 70.
However, since the plug connector 20 of this embodiment is extremely small (small dimensions in the front and rear, left and right, and top and bottom), it is difficult for an operator to grasp the plug connector 20 by hand. Therefore, in this case, the jig 115 shown in FIGS. 16 and 17 is used. The jig 115 is made of metal or resin, and a holding piece 116 that an operator holds by hand, and a presser step portion provided at a lower end portion of the holding piece 116 and having a flat upper contact surface 117 on the lower surface thereof. 118, a hanging portion 119 extending downward from the presser step portion 118 and having a flat side contact surface 120 whose front surface is orthogonal to the upper contact surface 117, and forward from the front surface of the side contact surface 120 A pair of left and right insertion protrusions 121 that protrude and have the same cross-sectional shape as the jig recess 26 are provided. Further, a pair of left and right semicircular recesses (the diameter of which is slightly larger than that of the insulator 42) are provided in the lower edge of the side contact surface 120.
The jig 115 is used by being attached to the connector 10 from the rear as shown in FIG. 17, for example. In this case, the two semicircular recesses 122 are respectively covered with the two insulators 42, and the upper contact surface 117 of the presser step portion 118 is placed on the rear end portion of the upper surface of the plug insulator 21. The side contact surface 120 is brought into contact with the rear surface of the rear wall portion 23. Then, the left and right insertion protrusions 121 are respectively fitted and integrated with the pair of jig recesses 26 on the rear surface of the plug insulator 21, so that the operator can lift the jig 115 upward while holding the grip piece 116. Good. Then, the upward movement force applied to the jig 115 is efficiently transmitted from the upper contact surface 117, the side contact surface 120, and the pair of insertion protrusions 121 to the plug insulator 21, so that the plug connector 20 is connected to the receptacle connector. It can be easily separated from 70.
The jig 115 may be used by being attached to the front portion of the connector 10. In this case, the upper contact surface 117 of the presser step portion 118 is placed on the front end portion of the upper surface of the plug insulator 21, and the side portion of the drooping portion 119 is used. The contact surface 120 is used in contact with the front surface of the front wall portion 23.
Further, a pair of parts corresponding to the jig 115 are provided on the front and rear (the parts corresponding to the front and rear jigs 115 are symmetrical with each other), and the upper ends of the parts corresponding to the gripping pieces 116 of both parts are mutually connected. A clip-type jig (not shown) in which the coupled portion (and the gripping piece 116) can be elastically deformed may be used. In this case, after the portions corresponding to the front and rear jigs 115 are separated from each other while elastically deforming the joint portion, the front and rear jigs are utilized by utilizing the elastic return force of the joint portion. The parts corresponding to 115 are brought close to each other, and the insertion protrusions 121 are inserted into the front and rear jig recesses 26 of the connector 10, whereby the plug insulator 21 is sandwiched and used by the jig.

In the present embodiment described above, the receptacle contact 90 has the elastic deformation portion 96 that can elastically sandwich the contact portion 54 (first contact plate 51, second contact plate 53) of the plug contact 50. Even when the receptacle contact 90 is downsized with the reduction in the height of the connector 10 (the vertical dimension is shortened), the contact portion 54 of the plug contact 50 with the receptacle contact 90 can be reliably contacted.
Furthermore, since the contact protrusion 102 of the receptacle contact 90 is fitted (locked) to the locking recess 55 of the plug contact 50, the fitting holding force between the receptacle contact 90 and the plug contact 50 can be increased. Further, since the click feeling can be obtained when the receptacle contact 90 and the plug contact 50 are connected, the operator can recognize incomplete fitting depending on the presence or absence of the click feeling, and can prevent poor contact and separation. Further, when the receptacle contact 90 is connected to the plug contact 50, the contact protrusion 102 is slidably contacted with a portion of the outer surface of the first contact plate 51 located above the locking recess 55 and then fitted into the locking recess 55. To do. For this reason, foreign matters such as dust and dirt adhering to the upper portion of the outer surface of the first contact plate 51 are removed by the contact protrusion 102, so that the receptacle contact 90 and the plug contact 50 can be reliably conducted. Is possible.
In addition, the elastic deformation portion 96 of the receptacle contact 90 extends in the left-right direction, and can be easily elastically deformed (ensure the elastic force and deformation amount) by increasing the length in the left-right direction. Even if the height of the receptacle contact 90 (elastically deforming portion 96) is reduced as the height of the connector 10 is reduced, the influence on the elastic deformation force of the elastically deforming portion 96 is small.
Since the contact portion 54 of the plug contact 50 is composed of two pieces, the rigidity of the contact portion 54 is ensured even when the plug contact 50 is as thin as 0.12 mm, and the plug contact 50 is in contact with the receptacle contact 90. Can prevent plastic deformation. Further, since the thickness of the contact portion 54 is increased, the displacement amount of the elastic deformation portion 96 of the receptacle contact 90 can be ensured, so that the contact reliability is improved.
Further, a step in the front-rear direction is formed between the contact portion 54 and the connecting portion 56 of the plug contact 50, and the wall portion 23 of the plug insulator 21 is positioned at this step portion. ) Can be increased. Therefore, even when the plug connector 20 is reduced in height and area, the mechanical strength of the plug insulator 21 and the effect of supporting the cable 40 by the wire support hole 25 can be increased. Furthermore, since the fitting protrusion 81 of the receptacle insulator 71 is fitted into the fitting recess 38 of the plug insulator 21 when the plug connector 20 and the receptacle connector 70 are mounted, an inadvertent external force is applied to the cable 40 and the like. However, the fitting recess 38 and the fitting protrusion 81 can reliably prevent the plug connector 20 and the receptacle connector 70 from being separated in the horizontal direction. Moreover, although the fitting projection 81 is provided on the receptacle insulator 71 side, the fitting projection 81 is fitted in the fitting recess 38 on the plug insulator 21 side, so that the vertical dimension of the connector 10 as a whole is large. It won't grow. Since the fitting protrusion 81 is fitted into the fitting recess 38 while improving the mechanical strength of the plug insulator 21 as described above, the plug connector 20 and the receptacle can be connected even when the height of the connector 10 is reduced. The connector 70 can be firmly connected.
In addition, since the fitting recess 38 is enlarged in the front-rear direction (the width direction of the receptacle contact 90) while reducing the area of the plug connector 20 by providing the step, the receptacle to be fitted to the fitting recess 38 is provided. The width of the contact 90 can be increased. Therefore, even when the area of the connector 10 is reduced, it is possible to prevent a decrease in the elastic force of the receptacle contact 90.

Furthermore, in the present embodiment, the contact portion 54 has a two-plate structure of the first contact plate 51 and the second contact plate 53 to increase its mechanical strength, and the mechanical strength of the fitting protrusion 81 by the reinforcing rib 84 is increased. Since the strength is increased and the engagement protrusion 24 of the plug insulator 21 is fitted in the engagement recess 73 of the receptacle insulator 71, even if the height of the connector 10 is lowered, The receptacle connector 70 can be connected more firmly. Moreover, although the vertical dimension of the plug connector 20 is increased by providing the engagement protrusion 24, the engagement protrusion 24 fits into the engagement recess 73 of the receptacle insulator 71. It does not hinder the overall height reduction of the connector 10. Furthermore, since the height of the wall portion 23 is increased by providing the engaging protrusion 24, the large-diameter wire support hole 25 can be formed even in the low-profile plug connector 20. Therefore, the cable 40 having a large diameter can be used, and the cable 40 can be stably supported.
Further, since the protruding amount from the fitting protrusion 81 gradually decreases as the reinforcing rib 84 moves upward from below, the reinforcing rib 84 hardly interferes with the cable 40 (insulator 42) in the wire receiving space 85. Therefore, even when the connector 10 is downsized (the wire receiving space 85 is downsized) and the diameter of the cable 40 is increased, the cable 40 is stored in the wire receiving space 85 without interfering with the reinforcing rib 84. it can.

As mentioned above, although this invention was demonstrated based on the said embodiment, this invention can be implemented, giving various deformation | transformation.
For example, the contact portion 54 of the plug contact 50 may have a single plate structure including only the first contact plate 51 or the second contact plate 53, or may have a structure of three or more.
Further, when the contact portion 54 is sandwiched between the contact protrusion 102 and the contact protrusion 103 of the receptacle contact 90 on the surface of the contact portion 54 and below the locking recess 55, the contact protrusion 102 and the contact protrusion It is also possible to form retaining protrusions that engage with 103 from below. In this way, when the plug connector 20 and the receptacle connector 70 are attached, the plug contact 50 and the receptacle contact 90 can be more reliably brought into contact with each other and a click feeling can be obtained.
A first locking projection is formed on the surface of the contact portion 54 instead of the locking recess 55, and when the plug connector 20 and the receptacle connector 70 are attached, the first locking projection is the elastic deformation portion 96. The contact protrusion (second locking protrusion) 102 may be overcome and the contact protrusion 102 may be locked from below. Also when comprised in this way, the effect similar to the case where the latching recessed part 55 is formed is acquired.
Further, a locking recess 55 (and the above-described retaining protrusion as required) or the first locking protrusion is formed on the elastic deformation portion 96 side, and a locking protrusion (first protrusion) corresponding to the contact protrusion 102 is formed on the contact portion 54 side. 2 locking projections) may be formed.
Further, at least one of the plug connector 20 and the receptacle connector 70 may be formed with a shape such as a minute protrusion for obtaining a concentrated load when contacting the other contact. FIG. 18 shows an example thereof, and a locking protrusion (locking protrusion) extending in the width direction (front-rear direction) of the receptacle contact 90 ′ is provided at a portion corresponding to the contact protrusion 102 of the receptacle contact 90 ′ of this modification. ) 125 is formed. The locking protrusion 125 is fitted into the locking recess 55 of the first contact plate 51 when the plug contact 50 and the receptacle contact 90 ′ are connected.
Further, the slit 27 may be omitted from the plug insulator 21.
Further, the jig recess 26 may be changed to a hole penetrating the wall portion 23.

Furthermore, it is also possible to implement in the form of the modified example shown in FIGS.
The plug insulator 21 ′ of the plug connector 20 ′ of the present modified example protrudes rearward (in a direction parallel to the cable 40 in a straight state) from the upper end portion of the rear surface and not having the slit 27, and from above. The structure is the same as that of the plug insulator 21 except that the holding protrusion 30 facing the cable 40 is provided. The upper half of the left and right electric wire support holes 25 extends to the lower part of the restraining protrusion 30, and a part of the restraining protrusion 30 covers a wall that blocks the left and right sides of the upper half of each electric wire support hole 25. It is composed.
Since the connector 10 has an extremely low structure, when the operator tries to separate the plug connector 20 ′ (plug connector 20) in the connected state from the receptacle connector 70, the operator can connect the plug connector 20 ′ (plug). It may be difficult to grasp the connector 20) by hand. Therefore, as shown in FIG. 22, there is a possibility that the operator can separate the plug connector 20 ′ from the receptacle connector 70 by bending the cable 40 upward by hand. Further, when used in a narrow internal space such as a mobile phone or a PDA, the cable 40 may be bent or twisted at a steep angle in the internal space, and further, repeated bending may be applied to the cable 40. When such bending (bending or twisting) occurs in the cable 40, the tension of the cable 40 is often transmitted to the plug connector 20 ′.
However, in the case of this modification, the cable 40 is guided left and right and upward by the restraining protrusion 30 (because bending of the portion of the cable 40 located in the plug insulator 21 ′ is suppressed), the pressure contact piece 60. Transmission of tension to the cable can be relaxed, and plastic deformation of the pressure contact piece 60 and cutting of the cable 40 can be suppressed. Therefore, more stable contact reliability can be obtained even in a low profile connector.
When the cable 40 is bent upward, an upward rotational force having a contact portion between the front locking claw 29 and the front locking protrusion 75 as a “fulcrum (rotation center)” is applied to the rear portion of the plug connector 20 ′. As a result, as shown in FIG. 22, the engagement between the rear locking claw 29 and the rear locking protrusion 75 is released. At this time, in the plug connector 20 of the above embodiment that does not include the restraining protrusion 30, the contact point between the cable support hole 25 on the rear side of the plug insulator 21 and the cable 40 becomes a "power point", and the locking claw 29 on the rear side The contact portion of the rear locking projection 75 becomes the “action point”, and as shown in FIG. 22, the distance from the “force point” to the “fulcrum” (L1) and the distance from the “fulcrum” to the “action point” are Since the bending force generated in the cable 40 (upward force generated in the “power point”) does not increase to a considerable extent (that is, if the cable 40 does not bend significantly), the upward generated in the rear locking claw 29 because it hardly changes. The rotational force does not exceed the engagement holding force of the rear locking claw 29 and the rear locking projection 75. That is, the engagement of the rear locking claw 29 and the rear locking projection 75 is released only when the bending force generated in the cable 40 becomes considerably large, but the plug connector 20 is connected to the receptacle connector 70. If such a large force continues to be applied to the plug connector 20 before being separated from the plug connector 20, the plug connector 20 and the receptacle connector 70 may be damaged. On the other hand, in this modification, the “power point” when the cable 40 bends upward while contacting the restraining projection 30 is the contact portion (point A) between the restraining projection 30 and the cable 40, and FIG. As shown, the distance (L) from the “force point” to the “fulcrum” is considerably longer than the distance from the “fulcrum” to the “action point” (because it is much longer than the distance L1), so that the bending generated in the cable 40 When the force reaches a certain level (before it increases so much), the upward rotational force generated in the rear locking claw 29 causes the engagement between the rear locking claw 29 and the rear locking projection 75. The combined holding force is exceeded, and the engagement between the rear locking claw 29 and the rear locking protrusion 75 is released. Therefore, it is possible to effectively prevent the plug connector 20 ′ and the receptacle connector 70 from being damaged.

DESCRIPTION OF SYMBOLS 10 Connector 20 20 'Plug connector 21 21' Plug insulator 22 Ceiling part 23 Wall part 24 Engaging protrusion 25 Electric wire support hole 26 Recessed jig (jig insertion part)
27 Slit 28 Elastic piece 29 Locking claw 30 Suppression projection 31 First holding hole 32 Second holding hole 33 Third holding hole 34 Partition wall 35 Arc surface 36 C-shaped surface 37 Receiving recess 38 Fitting recess 39 Fitting holding portion 40 Cable (electric wire)
41 Core wire 42 Insulator 50 Plug contact 51 First contact plate (contact portion)
52 Bent part (contact part)
53 Second contact plate (contact part)
54 Contact portion 55 Locking recess 56 Connection portion 57 Locking protrusion 59 Connection portion 60 Pressing piece 61 Holding claw 70 70 'Receptacle connector 71 Receptacle insulator 72 Bottom plate portion 73 Engaging recess 74 Side wall 75 Locking protrusion 76 Recessed recess 77 Contact holding projection 78 Upper groove (fixed groove)
79 Opposite groove (fixed groove)
81 Fitting protrusion 82 Receptacle contact recess 83 Plug contact recess (housing recess)
84 Reinforcement rib 85 Electric wire receiving space 90 Receptacle contact 91 Tail part 92 Fixing part 93 Supporting piece 94 Holding claw 96 Elastic deformation part 97 Connection base part 98 Hanging piece 99 Horizontal piece 100 Standing piece 101 Free end part 102 103 Contact protrusion (engagement) Stop)
104 Slit 110 Circuit board 115 Jig 116 Holding piece 117 Upper contact surface 118 Pressing step portion 119 Hanging portion 120 Side contact surface 121 Insertion protrusion 122 Semicircular recess 125 Locking protrusion (locking protrusion)

Claims (9)

A receptacle connector having a receptacle insulator and a pair of metal receptacle contacts mounted on a circuit board supported in a state aligned with the receptacle insulator in one direction;
A plug insulator, a pair of metal plug contacts supported on the plug insulator in a state aligned in the one direction, and extending in a direction substantially orthogonal to the one direction in which one end portion is connected to each plug contact. A receptacle connector and a detachable plug connector having a pair of electric wires;
In a connector comprising:
The plug contact extends in one direction and in a direction orthogonal to the opposing direction of the plug connector and the receptacle connector, a pair of connecting portions extending from the contact portion toward the other plug contact, and the pair of connections A pair of connection portions extending toward the other plug contact side after extending in a direction approaching each other from the portion, and connected to the electric wire,
A pair of fitting holding portions for fitting and holding the contact portion on a surface of the plug insulator facing the receptacle insulator, and a pair of fittings positioned between the pair of fitting holding portions and receiving the connecting portion A pair of recesses, a receiving recess for receiving the connecting portion and the wire formed between the pair of fitting recesses, a pair adjacent to the receiving recess and aligned with the connecting portion in the one direction and supporting the wire A wall portion extending to the receptacle connector side having a wire support hole, and
The receptacle contact has a fixed portion, a substantially U-shaped cross section that extends from the fixed portion toward the other receptacle contact side and opens on the plug connector side, and has a portion in which the contact portion can be inserted and removed. An elastically deformable portion in which the interval in the one direction of the opposing inner surface of the substantially U-shaped portion in the state is narrower than the dimension in the one direction of the contact portion;
A pair of fixing grooves for fitting and holding the fixing portion on a surface facing the plug connector of the receptacle insulator, and a pair of contacts positioned between the pair of fixing grooves and capable of elastically deforming the elastic deformation portion Projecting toward the plug connector between the recess for use and the pair of contact recesses, facing the free end of the elastically deformable piece in the one direction, and when the plug connector is attached to the receptacle connector A pair of fitting projections that fit into the fitting recess, and a wire receiving space that can receive the pair of wires formed between the pair of fitting projections;
A connector comprising: The connector according to claim 1, wherein
A connector in which a concave portion for contact and an accommodating concave portion in which the contact portion can be engaged and disengaged are formed on a surface facing the plug connector of the receptacle insulator in a direction parallel to the concave portion for contact and the electric wire. The connector according to claim 1 or 2,
An engagement protrusion is formed at the end of the wall portion of the plug insulator on the receptacle connector side,
A connector in which an engagement recess is formed in the receptacle insulator for receiving the engagement protrusion when the plug connector is attached to the receptacle connector. The connector according to claim 1 or 2,
The electric wire has a circular cross-sectional shape,
The receptacle insulator is connected to the plug projecting portion in the wire receiving space on the surface facing the plug connector, and the one direction from the mating projecting portion toward the plug connector side from the facing surface side. A connector with reinforcing ribs that protrudes gradually. The connector according to any one of claims 1 to 4,
A connector having a two-plate structure in which the contact portion of the plug contact is formed by bending one metal plate. The connector according to any one of claims 1 to 5,
A connector in which a jig insertion portion into which a part of a jig can be inserted and removed is formed on the plug insulator. The connector according to any one of claims 1 to 6,
A locking recess is formed in one of the contact portion and the elastic deformation portion,
On the other hand, a connector formed with a locking projection that fits into the locking recess when the plug connector is attached to the receptacle connector. The connector according to any one of claims 1 to 6,
Forming a first locking projection on one of the contact portion and the elastically deformable portion;
On the other hand, a connector formed with a second locking projection that gets over the first locking projection and locks to the first locking projection when the plug connector is attached to the receptacle connector. The connector according to any one of claims 1 to 8,
A connector in which an outer surface of the plug insulator protrudes in the extending direction of the electric wire, and a pressing protrusion that opposes the electric wire from the side of the plug connector separating from the receptacle connector.